Buddy up! Working out with a bud boosts the fun factor.
Here, Tone It Up! trainers and besties Karena Dawn and Katrina Hodgson share a circuit
perfect for partners. Grab your bestie, girlie, and get ready to get fit--fast!

Lay on your back with your knees bent, feet planted on the
ground and arms by your side. Have your friend stand over you. Lift one leg in
the air, then use your abs and arms to lift your hips and butt off the ground,
while your friend applies slight pressure on your foot. Alternate legs and
repeat 20 times. Switch positions.

Belly Buster

Lay on the ground with your friend, feet near each other’s
shoulders and arms out to the side. Use your abs to lift your legs to a
90-degree angle (you will both look like “L” shapes). Slowly lower your legs
halfway down and return to start. Next, use your abs to lift your butt off the
ground and move it a few inches to one side. Lower down and repeat 20 to 30
times.

Side Lunge for Two

Stand facing your partner, each with your feet together,
arms extended and holding hands. Both of you should lunge to the same side,
keeping your knee over your ankle and the opposite leg straight. Remember:
Avoid locking your straight-leg knee or risk injury. Tighten your abs, and push
yourself back to start. Repeat 20 to 30 reps on each side. Bonus points if you
can do ’em all without LOL-ing.

High-Five Plank

Start in a pushup position. Tighten your abs and high five
your partner, slapping opposite hands to make it a li’l more challenging. Don’t
forget to breathe (it happens!) and keep your body stiff as a board. Alternate
between hands and repeat 10 times. If you and your girl are way sporty, you can
repeat up to 30 times for a serious ab blast. Hello, new goal.

Lean on Me Pushups

Kneel on the ground, keeping your knees about shoulder-width
apart. Have your friend stand behind you and hold your ankles. Contract your
abs and slowly lean forward, gently falling into a pushup position. Lower down
into the pushup. Explode up, using your arms and glutes to get you back to
start. Repeat 10 to 20 times and then switch positions.

Link Leg Sit-Ups

Sit across from your partner with your legs interlocked (one
set of legs will be on top and the other should be underneath, using your feet
to “lock” the position). Lie on your backs. With your arms behind your head,
use your abs to rotate left and right while rising up to a seated position. At
the top, clap hands with your partner and twist back to start. Repeat 15 times
(going both left and right).